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PROCEEDINGS OF THE NATIONAL MUSEUM. 



vol. 43. 



a long, acute process, extending forward on either side of the head. 

 The third segment (second free segment) has three small spines on 

 the lateral margin anterior to the epimeron, which is small, and one 



spine posterior to the epimeron. The 

 fourth segment (third free segment) has 

 three spines on the lateral margin ante- 

 rior to the epimeron, the first being 

 small, the two following ones long and 

 acute, and two small spines posterior 

 to the epimeron. The fifth segment 

 (fourth free segment) as well as the 

 sixth segment (fifth free segment) have 

 each three spines on the lateral margin 

 on either side anterior to the epimeron, 

 the first one being small and the two 

 following ones long and acute. The 

 seventh or last thoracic segment (sixth 

 free segment) has two long, acute spines 

 anterior to the epimeron. The fifth and 

 sixth segments (fourth and fifth free 

 segments) are the longest and are sub- 

 equal. 



The first five segments of the abdo- 

 men are short and subequal and each 

 has the lateral margin produced on 

 either side in a long, acute process. 

 The sixth or terminal segment is about 

 as long as the four preceding segments 

 taken together; it terminates in an 

 acute point which is upturned. About 

 the middle of the dorsal surface are two spines, one on either side of 

 the median line. The lateral margin is produced on either side in 

 two long, acute processes, one a little below the middle of the seg- 

 ment and the other a little above. The peduncle of 

 the uropods is elongate; both branches are missing. 

 On the ventral side of the body is a long, median 

 spine on each of the thoracic and the first five ab- 

 dominal segments. 



The first pair of legs are chelate; they are large and 

 strong and have the propodus furnished with a tri- 

 angular process or tooth a short distance from the 

 articulation of the dactylus with the propodus. The 

 carpus also has a small triangular process near the proximal end, 

 (See fig 2.) The second pair of legs are fossorial and are a little longer 

 and stouter than any of the following, which are similar in structure 



Fig. 1.— Apseudes galapagensis. 



Fig. 2.— Apseudes 

 galapagensis. 

 First leg. 



